Potentials of waste plastic pyrolysis oil as an extender fuel for diesel engine

Pali

International Journal of Engine Research

2022

Fossil fuels are a major global concern due to escalating demand and current geo-politics. So demand has been arising for alternative fuel for I C engines. Alternatively, the generation of waste plastic is a severe environmental problem due to global disposal issues; however, it may be converted into alternative fossil fuel with minor amendments in fueling systems. So In this study, blends of waste plastic oil (WPO) have been investigated on CRDI diesel at variable injection timings (IT) (from 26°bTDC to 14°bTDC) to address above mentioned problems. The effect of different injection timings has been analyzed for WPO blends fuels, WPO10D90 (10% WPO+90% Diesel) and WPO20D80 (20% WPO+80% Diesel) and compared with baseline diesel fuel. In the experimental investigations, WPO20D80 achieved optimum results at IT of 17°bTDC; however, the original injection timings (ORG) was 23°bTDC. The optimal result has been provided as 6.7% greater BTE for WPO20D80 at 17°bTDC injection timing, and CO and NOx emissions have been reduced by 16% and 2.15%, respectively. So, suitable IT settings provided considerable improvement in performance and emissions for WPO blends with respect to baseline fuel and original injection timings. Furthermore, it can potentially be a long-term solution for the waste plastic disposal issue.

Section: Resultsmentioning

confidence: 99%

Effect of injection timing of waste plastic oil and its blends on CRDI diesel engine

Pali

International Journal of Engine Research

2022

“…to increase the BTE and also decreases the BSEC (Liu et al 2017;Tomar et al 2020). On both types of blends, the camphor oil enhances combustion by providing its fuel-born oxygen in case of blending with diesel and dilutes the viscosity due to blending with high viscous Karanja oil.…”

Section: Brake Thermal Efficiencymentioning

confidence: 99%

Numerical and experimental investigation of exergy, performance, emissions, combustion characteristics, and cyclic variations of CI engine fueled Karanja oil blended camphor oil and diesel blended camphor oil.

Gurusamy,

Subramaniyan,

Ponnusamy

2023

Preprint

This article compares the influence of the blending the low-viscous oxygenated camphor oil with hydrocarbon diesel fuel and high viscous oxygenated Karanja oil. The experiment is conducted in a four-stroke 1-cylinder naturally aspirated Kirloskar compression ignition (CI) engine coupled with an eddy current dynamometer. The three types of fuel blends are prepared by blending the camphor oil with Karanja oil on the volume ratio of 30:70 (C30K70), 50:50 (C50K50), and 70:30 (C70K30), and the other three types of fuels are prepared by blending the camphor oil with diesel on the volume ratio of 30:70 (C30D70), 50:50 (C50D50), and 70:30 (C70D30). The results reveal improvement in the engine performance characteristics of the brake thermal efficiency and brake specific energy consumptions due to the blending of camphor oil either with hydrocarbon diesel fuel or Karanja oil. Further, it also reduces the CO, HC, and smoke emissions with an increase in NO and CO2 emissions. The rate of pressure rise, net heat release rate and cyclic irregularities found to increase with increase in proportion of the camphor oil. The P-v diagram also confirms the lower heat addition period for the C70D30 and C70K30 with an increase in brake thermal efficiency. The actual compression ratio and the actual cut-off ratio are found to have a reasonable correlation with the thermal efficiency of the engine. Second-order polynomial equations were obtained for the engine characteristics using the Curve fitting method, and the characteristic equations confirmed the confidence level of 95%.

“…Notwithstanding this, MGO (ml-py) is compliant with ISO8217 specifications as regards marine gasoil, and the incomplete overlap between the molecular fingerprints of MGO (comm) and MGO (ml-py), as evident from Table 2, does not underscore an a priori better or worse performance of the fuel based on marine litter. Further testing of MGO (ml-py) as regards emissions and other parameters is a work in progress since pyrolyzed oil-based fuels could lead to reduced emissions [9,19].…”

Section: Gc-ms Analysis Of the Liquid Samplesmentioning

confidence: 99%

“…Notwithstanding this, MGO (mlpy) is compliant with ISO8217 specifications as regards marine gasoil, and the incomplete overlap between the molecular fingerprints of MGO (comm) and MGO (ml-py), as evident from Table 2, does not underscore an a priori better or worse performance of the fuel based on marine litter. Further testing of MGO (ml-py) as regards emissions and other parameters is a work in progress since pyrolyzed oil-based fuels could lead to reduced emissions [9,19]. Since Figure 3 takes into account only identified compounds, we decided to compare the chromatographic fingerprints of these samples displaying the total percent of the eluted area as a function of time, as shown in Figure 5, in order to avoid artefacts due to the lack of identification of some analytes.…”

Section: Gc-ms Analysis Of the Liquid Samplesmentioning

confidence: 99%

“…10 times lower than the market fuel prices in the case of a 10,000 kg/h plant [8]; and in the case of marine litter, the conversion into "drop in" fuels can become an effective nonmonetary reward for the depollution of the ocean. Another important motivation for producing pyrolysis oil from waste plastic is an overall reduction of about 30% in NOx, CO, and HC emissions observed in comparison with neat diesel [9]. Even if the circular economy approach to plastic waste management does not fully endorse chemical recycling, since produced fuels are just energy carriers, there are at least three cases in which the latter approach is the best strategy: (i) nonrecycled plastics, defined as the rejected streams (unable to be processed due to certain restrictions) that remain in the mechanical recycling centers, (ii) hospital plastics that might involve a severe biohazard, and (iii) highly nonhomogeneous and contaminated plastic waste, such as marine litter, which also comprises a wide array of other nonplastic materials, such as biomass, sand, clothes, glass, metals, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Recycling of Plastic Marine Litter: First Analytical Characterization of The Pyrolysis Oil and of Its Fractions and Comparison with a Commercial Marine Gasoil

Faussone

Cecchi²

2022

Sustainability

A detailed molecular fingerprint of raw pyrolysis oil from plastic wastes is a new research area. The present study focuses for the first time on the chemical recycling of plastic marine litter; we aim to chemically characterize the obtained raw pyrolysis oil and its distillates (virgin naphtha and marine gasoil) via GC-MS and FT-IR. For all samples, more than 30% of the detected compounds were identified. 2,4-dimethyl-1-heptene, a marker of PP pyrolysis, is the most represented peak in the chemical signature of all the marine litter pyrolysis samples, and it differentiates commercial and pyrolysis marine gasoil. The presence of naphthalenes is stronger in commercial gasoil, compared to its pyrolysis analog, while the opposite holds for olefins. The overlap between the two molecular fingerprints is impressive, even if saturated hydrocarbons are more common in commercial gasoil, and unsaturated compounds are more common in the gasoil derived from pyrolysis. A technical comparison between the commercial marine gasoil and the one obtained from the marine litter pyrolysis is also attempted. Gasoil derived from marine litter fully complies with the ISO8217 standards for distillate marine fuel. On the other hand, the virgin naphtha is particularly rich in BTX, ethylbenzene, styrene, and alpha olefins, which are all important recoverable platform chemicals for industrial upcycling.